Splish Brothers Inc. had a beginning inventory of 135 units of Product RST at a cost of $7 per unit. During the year, purchases were: a Feb. 20 650 units at $8 Aug. 12 units at $10 420 135 May 5 500 units at $9 Dec 8 units at $11 Splish Brothers uses a periodic inventory system. Sales totaled 1,520 units. la) (b) Determine the ending inventory and the cost of goods sold under each of the assumed cost flow methods (FIFO, LIFO, and average-cost). (Round answers to decimal places, eg. 150.) FIFO LIFO AVERAGE COST $ $ $ The ending inventory The cost of goods sold $ 6